#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main()
{
  pid_t id = fork();
  if(id > 0)
  {
    int count = 6;
    while(count)
    {
      printf("I am father, pid:%d, ppid:%d\n", getpid(), getppid());
      sleep(1);
      printf("count:%d\n", count--);
    }
  }
  else{
    while(1)
    {
      printf("I am child, pid:%d, ppid:%d\n", getpid(), getppid());
      sleep(1);
    }
  }
  sleep(1);
  return 0;
}
